<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册界面</title>
</head>
<body>
    <form action="/register" method="post">
        账户：<input type="text" name="username" placeholder="用户名必须是英文" required><br>
        密码：<input type="password" name="password" placeholder="密码不超过三位" required><br>
        <button type="submit">注册</button>
    </form>
</body>
</html>